Super Smash Bros for Wii U and 3DS were very successful games that millions of people loved, but not everyone got to play it. The Wii U had exclusive content that the 3DS version of the game didn't have, but not everyone had a Wii U. It was and still is a console that is very under-appreciated and very few people owns one. The new Nintendo Switch console is way more mainstream, and has a huge fanbase. I think bringing the beloved Smash game over to the Switch is a must, especially because I don't own a Wii U, and I want to play the game very badly :D